From dca0fcda8d24b90770adf154d4a3105996173b95 Mon Sep 17 00:00:00 2001
From: jreback <jeff@reback.net>
Date: Tue, 16 Jul 2013 17:46:46 -0400
Subject: [PATCH] CLN: define __hash__ directly for _NaT; needed for some
 builds on py3k

---
 pandas/tslib.pyx | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pandas/tslib.pyx b/pandas/tslib.pyx
index eb1b460df0bca..3439e6bb37eb7 100644
--- a/pandas/tslib.pyx
+++ b/pandas/tslib.pyx
@@ -581,6 +581,10 @@ cdef inline bint is_timestamp(object o):
 
 cdef class _NaT(_Timestamp):
 
+    def __hash__(_NaT self):
+        # py3k needs this defined here
+        return hash(self.value)
+
     def __richcmp__(_NaT self, object other, int op):
         # if not isinstance(other, (_NaT, _Timestamp)):
         #     raise TypeError('Cannot compare %s with NaT' % type(other))